According to the query of cf (Crossing the Fire Line) official website, CF White Deer Lottery Coin can be used to participate in shopping mall lottery activities, such as props or clothes. To use Millennium Lotto coins, you can follow the following steps:

1. Open the game of crossing the line of fire and enter the game hall.

2. Look for a lottery entrance or a lottery button on the game interface, usually with a special icon logo.

3. Click to enter the lucky draw page. On the lottery page, you will see the option of using the Millennium lottery currency, and there will be different lottery opportunities or pools for you to choose from.

4. Choose the lottery opportunity or pool you want to participate in, and choose to use the white deer lottery coin for the lottery.

5. After confirming the lottery, the system will automatically carry out the lottery process and display the rewards you have won.